FI112926B - The dressing tools - Google Patents

Description

112926

Direction - Riktdon

The present invention relates to a guide, and more particularly to a guide carrying a combination of disks.

Various types of wing guides have been used in the art.

One such device is disclosed in U.S. Patent 3115431, issued December 24, 1963 to 10 Stokes et al. This device includes a plurality of overlapping rotating discs mounted on a plurality of substantially parallel, planar, adjacent axes. The discs on the shafts are spacers evenly spaced on adjacent shafts. In the arrangement described, the discs on the adjacent axes rotate in the same direction except for the last discs of the series of discs which rotate in the opposite direction. This type of arrangement (hereinafter referred to as the Stokes arrangement) has been found to be satisfactory, especially when using long wood strands. The contents of the patent of Stokes et al are incorporated by reference into the present invention.

20 Another similar device is shown in the Burkner U.S. Patent 4,666,029, issued 19/5/1987, but in this patent are disks on adjacent shafts are arranged in pairs next to each other so that the second pair of discs "i" määritteevät orienting one side and the next axially space pair in the disks form the other side of the fairway. This 25 arrangement (referred to hereinafter as the Burkner arrangement) is also satisfactory, but * »

The Stokes arrangement is not so complicated and its thread alignment efficiency has been found to be approximately as good as the Burkner arrangement.

.. Burkner et al. is hereby incorporated by reference.

30 Both Burkner's U.S. Patent 4,380,285, issued April 19, 1983, and Bossier's U.S. Patent No. 4,623,558, issued November 18, 1986, both disclose a combination of discs mounted on parallel axes spaced from one another so as to be stationary. , above and between substantially vertical guide walls, which guide walls form directional passages through which the filaments fall and orient in the desired direction. A guide of this type has not been found to be particularly 'satisfactory in the sense that the end product will have the required orientation and strength.

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Canadian Patent 920529, issued February 6, 1973 to Turner et al., Discloses another type of direction in which partitions are designed to be movable to prevent clogging.

U.S. Patent No. 3,879,731, issued April 30, 1974 to Wood et al., Discloses another type of direction utilizing a plurality of vertically stacked lids, each of which consists of stationary flaps with oscillating apertures that facilitate the movement of the strands between them. The number of flaps in each cover is twice the number of flaps in the pack immediately above 10, so that the flaps in the upper cover are directly above the corresponding flaps in the lower cover and the upper cover distributes the flow of fibers and is thus distributed over the next lower cover. In this device, the distance between the flaps on the top cover is approximately half of the average length of the strands to be oriented, and the distance between the top and bottom covers is defined to be greater than the average length of the strands. The alignment system used in this patent obviously has no utility in aligning long strips and does not work well with conventional thread lengths (3-4 inches).

U.S. Patent No. 4,494,919, issued Jan. 22, 1985 to Knudson et al., Discloses another type of filament orientation device, particularly suitable for long filament orientation and division.

• '·,. It is also known to use forward rectifiers as described in Crittenden et al., U.S. Pat. . ·. U.S. Patent No. 5,325,954, in which two guide covers are stacked on top of each other. · · ·. such that the axial spacing between the discs in the top cover is significantly greater than the disks in the top cover between them.

3, 112926

The vertical distance between the bottom of the guide and the resulting washer or top of the liner is very important, i.e., the distance that the strands can fall freely without being laterally restrained between the plane where they are retained by the shuttle walls of the lowest deck of the multi-guide system. to maintain our orientation. When discs are used, the gaps between the lower edges of adjacent wafers forming the same wall of one directional passage, in turn, increase the vertical and orientation loss, since this raises the bottom edge of the passage significantly above the bottom edge of the disk frames. This is a problem-10 model when the wings are used as sidewalls.

The disks were initially used in the guides to prevent clogging and to separate the strands of different lengths so that the resulting cured composite product had different strength properties due to the different strands of length across the product thickness. Bringing longer strips close to the surface increases the bending strength of the panel product.

The use of wings as walls of the directional lanes significantly reduces the passage of the strands as compared to the use of rotating disks on the walls of the lanes.

Similarly, when using a single deflector cap with a narrow slit for good orientation, the throughput is found to be relatively low even when rotating disks are used as walls of the guideways, whereby the guide must be made longer and the gap between the rotating disks must be filled. open to increase passage.

i \. 25:. *. It is an object of the present invention to provide a direction capable of directing, * ·, wood strands or the like and to improve their orientation relative to that obtained by conventionally used disc guides.

; 30

In general, the present invention relates to a guide comprising a plurality of parallel axes spaced apart, a plurality of axially spaced radially extending discs which:. are mounted on each of said axes as they are defined substantially vertically. The side walls of the directly extending directional passages, and many of the discs are disposed apart from said axes defining one sidewall of said substantially vertical directional passage, and the shape of said discs extending between said adjacent pair forms the said passageway 4 1126; said sidewall and closing the gap formed between the lower adjacent edges of said adjacent wafers.

Preferably, each of said blades is substantially in the same vertical plane as the corresponding adjacent wafer, the gap between which is closed by said blade.

Preferably, each of said discs is provided with a circumferential groove extending about its circumference and receiving said wing to align it with said adjacent discs.

10

Preferably said groove is formed between two cooperating wafer elements which are joined to form each of said wafer.

Preferably, a bottom is formed in said groove by means of an annular insert which is disposed between each wafer element of said wafer.

Each of said discs is preferably provided with notches spaced from one another about the circumference of the disk and extending radially si-20 at a certain distance, the lower edge of said blade extending below a plane containing said parallel axes at a distance at least equal or less than the radius of the bottom of said groove and the radius of said discs.

Preferably, said discs have an equal radius.

. · · *. Said adjacent discs which form said one wall of each bus are preferably mounted on the rotary shafts, and the discs on the rotary shafts are mounted axially spaced halfway between the discs located on said axes between the rotary axes.

'* Each of said shafts is preferably positioned in a wiper position such that it protrudes over the top of an adjacent blade to clean it:. strands.

Other features, objects, and advantages of the invention will be described in the following detailed description of preferred embodiments of the invention, taken in conjunction with the accompanying drawings, in which:

Fig. 1 is a schematic isometric fragmentary view of a portion of a guide on which the blades of the present invention are built as an integral part, but the discs are spaced apart, which makes the image clearer.

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Fig. 2 is a side view of a small portion in a direction, with the wings shown in the figure being mounted and with one of the discs broken away.

Figure 3 shows a section along line 3-3 of Figure 2.

Fig. 4 is a schematic illustration of a multilevel rectifier constructed to incorporate the present invention.

Figure 5 is a graph of the mean angular misalignment relative to the height measured from the washer of the lower parts of the discs or vanes.

Preferred embodiments of the invention will now be described.

As shown in Figure 1, strands 10 or the like 12 are fed to the guide 10 from a feed belt 14 or a diverting roll 16 (preferably provided with spikes) which feed the wood fiber stream 18 to the guide 10 above.

: 'The wood strands commonly used in the directional arrangement of the present invention can be within a reasonable length of any length - usually less than 12; '; inches, less than about 0.25 inches thick, normally less than about 0.05 inches,. ' ·. and usually about 1/2 inch wide and up to 3 inches in length, with an '' 'length to width ratio of at least 2.

The orientation 10 illustrated in the arrangement shown consists of a plurality of rotary axes and a plurality of intermediate axes, all arranged in substantially the same plane and extending substantially parallel to one another. FIG · 'from the left side of the shaft by the reference numerals 20A, 20B, 20C and 20D and adjacent the left side of the Figure the shaft by the viitenume-35 coefficient 22A, 22B, 22C commencing with 22A, so that the intermediate shaft 22A on the alternate shafts 20A and 20B between the , axis 22B between axes 20B and 20C and axis 22C between axes 20C and 20D. In Figure 1, the axial distance between the disks is joined for clarity reasons.

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The level at which the axes are held is represented schematically by a dotted line 19.

The discs 24A on the rotary shafts 20A, 20B and 20D are joined to form one wall of the vertical bus 26A. The letter A is used to refer to the discs 5 which rotate in a single plane substantially perpendicular to plane 19 and defining most of the first vertical (or front of the figure) vertical bus or directional bus 26A from one wall.

In the illustrated embodiment, a second disk shackle 24B is mounted to the intermediate shafts 10 22A, 22B and 22C. These disks 24B define a second wall of the bus 26A substantially parallel to the wall formed by the disks 24A, and also form a wall of the next bus 26B, i.e., the front of the figure, a second bus wall having opposite sides defined by the rotation shafts 20A, 20B, 20C and 20D. 24C, wafers, and as shown in the figure, as 15, these disks 24C combine to form the next vertical orienting passage 26C wall having opposite side defined by the disks 24D and so on across the width of the mouth 10 trout.

Obviously, the walls on opposite sides of the passageways 26A, 26B and 26C are defined by discs on primarily adjacent axes.

The discs on the intermediate shafts are axially spaced substantially halfway between the discs on the rotary shafts, i.e., the discs 24B are: · spaced halfway between the discs 24A and 24C and the discs 24 are spaced halfway apart between the wafers; . ·. Between 24 B and 24D, etc.

The arrangement described is defined above as a Stokes arrangement, i.e. it uses a *,, a wafer arrangement such as that known from Stokes et al. of the patent cited above. It is obvious that the Burkner arrangement can also provide a similar structure.

• j .; It is obvious that there is a gap G between the disks 24A on the different axes 20A, 20B, 20C and 20D, as well as the discs 24C on the same axis and the discs 24B on the axes - 35, 22A, 22B and 22C and on the same axes. between the discs 24D, i.e. a gap is formed between adjacent discs,. 'Which define the wall of vertical buses 26A, 26B, 26C, etc.

112926 7

Slit G is filled with a blade or blade member 30 which completely closes it. In the illustrated arrangement, the wing member 30 located between adjacent discs, such as disks 24A on shafts 20A and 20B, is mounted on a suitable bearing, not shown, on shaft 22A and engages with adjacent disc 24A as illustrated. hereinafter, filling the gap G completely and extending a certain distance above its bearing axis 22A.

Each wing member 30 has an upper surface or edge 32, which is preferably substantially concave, and a substantially rectangular bottom surface or edge 34, preferably substantially parallel to plane 19, which includes the axes of the shafts. In the event of clogging at the top of the wings, the concave surface may be replaced by an oblique surface which is inclined downward in the direction of the strands moved by the discs; however, regardless of the shape of the top edge 32, the edge must be located sufficiently low below the top periphery of the adjacent discs spaced axially apart.

The fixed line arrangement illustrated in Figure 2 utilizes discrete elements 30 disposed between each wafer 24A. The bottom edge 30 of these elements protrudes downward to a position slightly higher than the lowest radial position of the discs 20, i.e., the height H is preferably slightly less (to 1/4 inch) than the radius R of the discs 24A.

If desired, the wing 30 can be extended well below the radius R, which is illustrated by dashed lines 36. In the arrangement illustrated, dotted lines 38; 25 to see that all elements 30 are separate elements joined together at line 38. However, the elements 30 may be manufactured as a continuous element extending substantially over the entire length of the guide 10.

With regard to the mounting, it is advantageous to divide the wing from the lower part 42 into a separate upper part 40, which is shown in the figure by a splitting line which divides the shaft on which the wing 30 is mounted for removing or facilitating the mounting of the blades 30.

The upper edge 32 of the wing shown in the figure is substantially concave, but can be modified 35 to reduce the risk of clogging. Each disc 24 has grooves or notches 46 which assist in cleaning any threads at the upper edges 32. In addition, a wiper 48 is mounted on each shaft adjacent to the blade 30, which wiper 48 is provided with a spike or the like 50 which contributes to cleaning the upper surface 32 and ensuring that the strands do not remain blocked in the passages on the shafts.

In Figures 1 and 2, wings 30 are further referred to as reference letters A, B, C or D, depending on which disc 24A, B, C or D the wing cooperates to form the fairway wall.

As can be seen in Figure 3, in the preferred embodiment each wafer 24 is comprised of a relatively thin pair of outer disks 52 and 54 and an inner wafer or intermediate wafer 56 that holds the outer disks 54 spaced apart and defining the bottom of the peripheral groove 58 in each wafer 24. the distance between the surfaces determines the width of the circumferential groove 58, which is slightly larger than the thickness of the blades 30 to accommodate the blades. The grooves 58 normally have a depth of at least about 1/2 inch and do not exceed about 1 15 1/2 inches, i.e., the radius R is 3/4 to 1 1/2 inches less than the radius r (see Figure 2).

The depth of the groove 58 is defined so that it holds the blade 30 in place but is not so deep as to cause any greater problem in terms of the strands penetrating and blocking the groove.

The depth of the notches 46 as measured from the area between the periphery of the disc or discs 20 or 22 and the bottom of the notches 46 is generally not greater than the difference R-r.

, It is evident during operation of the device that all discs or shafts rotate in a favorable manner; ·: In the same direction as indicated by the arrow in Figure 2, and that the wipers 48 are • '' 25 each connected to their respective axes to rotate with them. The height of the edge 34 allows a relatively even distance from the bottom of the guide to the base 80 of the washer 82, see Figure 4, which significantly improves the passage through the guide. the final orientation of the filaments, i.e. the additional height of the slot G can thus be substantially eliminated.

30

Figure 4 shows a modification of the present invention employing an oral; . This is similar to the applicant's Short Patent Application

Srand Orienter is shown in a direction in which a plurality of wafers are arranged overlapping.

In this arrangement, the base shafts are referred to by reference numeral 60A as their forming cover, while the intermediate shafts are referred to by reference numeral 60B as they form the intermediate cover and the upper shafts are designated by reference numeral 60C as they form the top cover. Each of these axes 60A, B, and C represents a plurality of axes 20A, 20B, 20C, 20D, 22A, 22B, 22C, etc., and define a guide at each plane. The discs 62A and the axes 60A are disposed relatively close together and define the widths of the bottom of the directional passages, referred to by reference numerals 64A, B, and C, which determine a sufficient width for the passages to achieve the required degree of orientation of the strands. The buses 64A, B actually divide the buses between the disks 62B on the axis 60B, i.e. the buses 70A or 70B, which in turn divide the bus / passages 68 formed between the discs 62C on the axes 60C.

Fig. 4 shows a relatively long wing 66 (referenced by reference numerals 66A and 66B) hanging below each wafer 62C defining a relatively le-10 wide passage 68. The wide passageway 62B and a wing 74 extending below it divide this wide passage into two preferably one wide bus 70A and 70B.

As described above, the disks 62A divide the buses 70A into the buses 64A, 64B, 64C and 64D. The vanes 76A and B extend downwardly from discs 62A, with the lower edges of all vanes 66A, 66B, 74, 76A and 76B aligned on a plane 78 substantially parallel to the upper portion 80 of the washer 82 formed by the belt or similar common spacer 84, i.e. the distance between the plane 78 is substantially uniform.

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With the above-described embodiments shown in Figure 4, it is possible to form a direction in which the throughput is improved as described in said application.

; '25 In the embodiment illustrated in Fig. 4, no prongs 50 are shown.' : wipers 48, but used to ensure that the upper edges of the blades and shafts are kept clean and that clogging is substantially possible; avoid.

'· · 30 Example •: *. A single cover or several covers were stacked, each of which was made as in Stokes ice cream, using 16 inches in diameter. i discs with 2 inch diameter shafts. In all cases, the wheel passage through the bottom disc was 1 1/2 inches (bus width). A 6-inch fiber blend was fed to the guide and the orientation was measured and the number of covers changed.

As depicted in Figure 5, with only one disc (bottom 112926 cover), the orientation was weakest, and with two wafers with bottom wings as described herein, the orientation was significantly better than any other amount of cover used.

It will be apparent that the wings used in all embodiments are relatively thin, flat elements, i.e. planar elements, and are preferably located in a plane consisting of discs working together with them.

Occasionally, the adhesive to be added to the strands may tend to aggregate, and then some additional means may be used to remove this adhesive from the peripheral grooves receiving the wings, e.g. scrapers, non-stick coatings, etc.

Based on the description of the foregoing invention, the invention may be modified by means known to those skilled in the art without departing from the scope of the invention as defined in the appended claims.

Claims (9)

A directional device consisting of a plurality of spaced parallel axes, a plurality of axially spaced radially extending discs mounted on said shafts defining side walls of substantially vertically extending directional passages, characterized in that each of the aforementioned the disk groups lie on different axes and define the substantially vertically extending directional passages, and that between the said adjacent disk pairs there are wings which form said side wall to said passage and close the lower gap between the adjacent peripheries of said discs. A directional device according to claim 1, characterized in that each of said wings is in substantially the same vertical plane as its corresponding adjacent disc, whose intermediate gap closes said wing. t A device according to claim 2, characterized in that each of the said discs is provided with a circumferential latch extending along the circumference of the disc, and that the lateral edges of said wing are inserted into the latch in the adjacent discs with which the wing cooperates. said wing is retained directed towards said adjacent discs. :, 30 A device according to claim 3, characterized in that each of the said rafters is formed between a pair of cooperating disc elements which are combined: to form each of said discs. 13 112926 Targeting device according to claim 4, characterized in that the bottom of each of the said rafters has been formed by means of an annular insert positioned between each said disk element in each said disk. A device according to any one of claims 1-5, characterized in that each of the aforementioned shafts is provided with a scraper protruding from the upper edge of the upper edge of an adjacent wing to plaster it on fibers. A device according to any one of claims 1-6, characterized in that each of said disks is provided with slots located along its periphery which have radially extending a certain distance mesh, and that the lower edge of said wing extends somewhat below the plane comprising said parallel axes at a distance less than the radius of said discs. 8. A device according to any of claims 1-7, characterized in that all discs have substantially the same radius. A device according to any one of claims 1 to 8, characterized in that said adjacent discs, which form said one wall for each passage, are mounted on alternating shafts of said plurality of shafts, and that the discs on it between the alternating shafts. the located shafts are mounted axially spaced halfway between the disks on said alternating shafts. I <· I I t I »# I> I> 4